Molecular formula
C18H21NO5
190 compounds have this formula on CompoundList.
- Molar mass
- 331.37g/mol
- Monoisotopic mass
- 331.1420Da
- Atoms
- 45
- Elements
- 4
- Rings plus double bonds
- 9
The formula C18H21NO5 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 5 oxygen atoms. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 1865.24%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.39%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 14.23%14.007 × 1 = 14.007 g/mol
- O Oxygen × 524.14%15.999 × 5 = 79.995 g/mol
Look up another formula
Compounds with the formula C18H21NO5
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 190 of 190 compounds
N-(2,5-Dimethoxyphenyl)-2-(2-methoxyphenoxy)propanamide
CAS 815620-75-8C18H21NO5
![4-Methyl-3-[(2,3,4-trimethoxybenzyl)amino]benzoic acid chemical structure, C18H21NO5, CAS 881445-63-2](/s/ATHXQTUBMWLCCG-UHFFFAOYSA-N.svg)
4-Methyl-3-[(2,3,4-trimethoxybenzyl)amino]benzoic acid
CAS 881445-63-2C18H21NO5
![2-Methyl-3-[(3,4,5-trimethoxybenzyl)amino]benzoic acid chemical structure, C18H21NO5, CAS 886632-75-3](/s/PDGRYWIIZGOSPL-UHFFFAOYSA-N.svg)
2-Methyl-3-[(3,4,5-trimethoxybenzyl)amino]benzoic acid
CAS 886632-75-3C18H21NO5
N-(3-Ethoxyphenyl)-3,4,5-trimethoxybenzamide
CAS 899531-91-0C18H21NO5
(2R,3R)-3-((tert-Butoxycarbonyl)amino)-2-hydroxy-3-(naphthalen-1-yl)propanoic acid
CAS 1217753-28-0C18H21NO5
![Benzenepropanoic acid, 4-cyano-beta-[[(1,1-dimethylethoxy)carbonyl]oxy]-alpha-methylene-, ethyl ester chemical structure, C18H21NO5, CAS 1311318-49-6](/s/WQSIQLRVMJDIHV-UHFFFAOYSA-N.svg)
Benzenepropanoic acid, 4-cyano-beta-[[(1,1-dimethylethoxy)carbonyl]oxy]-alpha-methylene-, ethyl ester
CAS 1311318-49-6C18H21NO5
![(E)-3-(Benzo[d][1,3]dioxol-5-yl)-1-(1,5-dioxa-9-azaspiro[5.5]undecan-9-yl)prop-2-en-1-one chemical structure, C18H21NO5, CAS 1351664-44-2](/s/FEEUSDCUTUNVFJ-HWKANZROSA-N.svg)
(E)-3-(Benzo[d][1,3]dioxol-5-yl)-1-(1,5-dioxa-9-azaspiro[5.5]undecan-9-yl)prop-2-en-1-one
CAS 1351664-44-2C18H21NO5
(E)-3-(3,4-Dimethoxyphenyl)-N-(3-(furan-2-yl)-3-hydroxypropyl)acrylamide
CAS 1421587-42-9C18H21NO5
![(E)-3-(Benzo[d][1,3]dioxol-5-yl)-1-(7,7-dimethyl-6,8-dioxa-2-azaspiro[3.5]nonan-2-yl)prop-2-en-1-one chemical structure, C18H21NO5, CAS 1396893-34-7](/s/DGMGOHVLRPLZSX-GQCTYLIASA-N.svg)
(E)-3-(Benzo[d][1,3]dioxol-5-yl)-1-(7,7-dimethyl-6,8-dioxa-2-azaspiro[3.5]nonan-2-yl)prop-2-en-1-one
CAS 1396893-34-7C18H21NO5
![(E)-3-(Benzo[d][1,3]dioxol-5-yl)-1-(1,9-dioxa-4-azaspiro[5.5]undecan-4-yl)prop-2-en-1-one chemical structure, C18H21NO5, CAS 1421586-70-0](/s/KZWDCKPREJTDJX-DUXPYHPUSA-N.svg)
(E)-3-(Benzo[d][1,3]dioxol-5-yl)-1-(1,9-dioxa-4-azaspiro[5.5]undecan-4-yl)prop-2-en-1-one
CAS 1421586-70-0C18H21NO5
(E)-3-(3,4-Dimethoxyphenyl)-N-(3-(furan-3-yl)-3-hydroxypropyl)acrylamide
CAS 1428381-82-1C18H21NO5
![Methyl 4-{[3-(2,5-dimethylfuran-3-yl)-3-hydroxypropyl]carbamoyl}benzoate chemical structure, C18H21NO5, CAS 1421494-34-9](/s/AMIFBUGEXFXGKV-UHFFFAOYSA-N.svg)
Methyl 4-{[3-(2,5-dimethylfuran-3-yl)-3-hydroxypropyl]carbamoyl}benzoate
CAS 1421494-34-9C18H21NO5
![4-{[1-(2,5-Dimethylfuran-3-carbonyl)piperidin-4-yl]oxy}-6-methyl-2H-pyran-2-one chemical structure, C18H21NO5, CAS 1787880-67-4](/s/YOQFCEAEBAMDNJ-UHFFFAOYSA-N.svg)
4-{[1-(2,5-Dimethylfuran-3-carbonyl)piperidin-4-yl]oxy}-6-methyl-2H-pyran-2-one
CAS 1787880-67-4C18H21NO5
![tert-Butyl 8-hydroxy-7-methyl-5-oxo-4,5-dihydro-1H-chromeno[3,4-c]pyridine-3(2H)-carboxylate chemical structure, C18H21NO5, CAS 2227149-35-9](/s/AFYLMOMTCHOXEF-UHFFFAOYSA-N.svg)
tert-Butyl 8-hydroxy-7-methyl-5-oxo-4,5-dihydro-1H-chromeno[3,4-c]pyridine-3(2H)-carboxylate
CAS 2227149-35-9C18H21NO5
N-(1S)-Camphanoyl-(R)-phenylglycine
CAS 123039-57-6C18H21NO5
![5-Ethoxy-2-[(3,4,5-trimethoxyphenyl)methylideneamino]phenol chemical structure, C18H21NO5, CAS 26698-97-5](/s/KOKYHYXMDPZYSW-UHFFFAOYSA-N.svg)
5-Ethoxy-2-[(3,4,5-trimethoxyphenyl)methylideneamino]phenol
CAS 26698-97-5C18H21NO5
N-(2-Ethoxyphenyl)-2,4,5-trimethoxybenzamide
CAS 700851-45-2C18H21NO5
7-(2-Morpholino-2-oxoethoxy)-4-propyl-2H-chromen-2-one
CAS 858744-74-8C18H21NO5
![Diethyl [(2-methyl-4-phenyl-1,3-oxazol-5-yl)methyl]propanedioate chemical structure, C18H21NO5, CAS 89149-92-8](/s/ZFNFNRCUMGVNOY-UHFFFAOYSA-N.svg)
Diethyl [(2-methyl-4-phenyl-1,3-oxazol-5-yl)methyl]propanedioate
CAS 89149-92-8C18H21NO5
![2-Methyl-3-[(2,3,4-trimethoxybenzyl)amino]benzoic acid chemical structure, C18H21NO5, CAS 886634-12-4](/s/KSIZIUVZVYXCBY-UHFFFAOYSA-N.svg)
2-Methyl-3-[(2,3,4-trimethoxybenzyl)amino]benzoic acid
CAS 886634-12-4C18H21NO5
![N-[3-(2-Methoxyethoxy)phenyl]-2-(4-methoxyphenoxy)acetamide chemical structure, C18H21NO5, CAS 925092-25-7](/s/LWYAFHQKROSBHP-UHFFFAOYSA-N.svg)
N-[3-(2-Methoxyethoxy)phenyl]-2-(4-methoxyphenoxy)acetamide
CAS 925092-25-7C18H21NO5
N-(4-Hydroxy-3-methoxyphenethyl)-2-(3-hydroxy-4-methoxyphenyl)acetamide
CAS 21411-19-8C18H21NO5
Ethyl 1-(4-ethoxy-4-oxobutyl)-3-formyl-1H-indole-2-carboxylate
CAS 903162-88-9C18H21NO5
![2-[(2R,6S,E)-5,12-Dioxo-2-phenyl-1-oxa-4-azacyclododec-8-en-6-yl]acetic Acid chemical structure, C18H21NO5, CAS 1192277-18-1](/s/VIVJFFCHCSVWEJ-VYFMESHYSA-N.svg)
2-[(2R,6S,E)-5,12-Dioxo-2-phenyl-1-oxa-4-azacyclododec-8-en-6-yl]acetic Acid
CAS 1192277-18-1C18H21NO5
- (E)-3-(3,4-Dimethoxyphenyl)-N-(2-(furan-2-yl)-2-methoxyethyl)acrylamide1799262-92-2C18H21NO5
- (E)-3-(Benzo[d][1,3]dioxol-5-yl)-1-(3-((tetrahydrofuran-3-yl)methoxy)azetidin-1-yl)prop-2-en-1-one2321336-56-3C18H21NO5
- Iminodibenzyl acid maleate117567-09-6C18H21NO5
- 5H-Pyrano[2,3-b]quinolin-5-one, 3-(acetyloxy)-2,3,4,10-tetrahydro-7-methoxy-2,2,10-trimethyl-, (S)-62624-43-5C18H21NO5
- 1,2,3,4-Tetrahydro-1-(3,4,5-trimethoxyphenyl)-4,6-isoquinolinediol93202-94-9C18H21NO5
- 2-(4-Methoxyphenyl)-N-(3,4,5-trimethoxyphenyl)acetamide827621-67-0C18H21NO5
- Methyl [7-hydroxy-4-methyl-2-oxo-8-(pyrrolidin-1-ylmethyl)-2H-chromen-3-yl]acetate858759-93-0C18H21NO5
- L-Isoleucine, N-(5-(1,3-benzodioxol-5-yl)-1-oxo-2,4-pentadienyl)-90778-81-7C18H21NO5
- N-(2,5-Dimethoxyphenyl)-4-(2-methoxyethoxy)benzamide882085-11-2C18H21NO5
- 8-(4-Oxo-4H-chromene-3-carboxamido)octanoic acid209961-26-2C18H21NO5
- Unsevine4838-99-7C18H21NO5
- L-Leucine, N-(5-(1,3-benzodioxol-5-yl)-1-oxo-2,4-pentadienyl)-90778-80-6C18H21NO5
- O6-benzyl O7-ethyl 2-oxo-6-azaspiro[3.4]octane-6,7-dicarboxylate1272656-68-4C18H21NO5
- 1-({2-[4-(Furan-2-yl)phenyl]-2-hydroxyethyl}carbamoyl)-1-methylethyl acetate2097889-02-4C18H21NO5
- Methyl (E)-4-oxo-4-spiro[3,5-dihydro-1,4-benzoxazepine-2,4'-oxane]-4-ylbut-2-enoate2411337-26-1C18H21NO5
- tert-Butyl (3-(benzo[d][1,3]dioxole-5-carbonyl)bicyclo[1.1.1]pentan-1-yl)carbamate2857037-76-2C18H21NO5
- Methyl 4-(ethoxycarbonyl)-2,3-dihydro-5-methyl-2-oxo-1-(phenylmethyl)-1H-pyrrole-3-acetate649766-33-6C18H21NO5
- (-)-Tazettine2286399-01-5C18H21NO5
- 3-Hydroxy-L-tyrosine 2-(4-methoxyphenyl)ethyl ester99877-10-8C18H21NO5
- 3,4-Dihydro-2-[4-(methoxycarbonyl)phenyl]-4-oxo-1(2H)-pyridinecarboxylic acid 1,1-dimethylethyl ester1644668-24-5C18H21NO5
- 3-Methyl 1-(phenylmethyl) 4-oxo-3-(2-propen-1-yl)-1,3-piperidinedicarboxylate1889292-39-0C18H21NO5
- Methyl 3-{3-[2-(hydroxymethyl)-6-methoxypyridin-3-yl]-4-methoxyphenyl}propanoate1270038-12-4C18H21NO5
- 1-Ethoxy-3-[4-(4-nitrophenoxy)butoxy]benzene6481-78-3C18H21NO5
- (NZ)-N-[1,2-bis(3,4-dimethoxyphenyl)ethylidene]hydroxylamine6267-07-8C18H21NO5
- O-Acetyl-(-)-norscopolamine5027-68-9C18H21NO5
- Diethyl [(6-methoxynaphthalen-2-yl)amino]propanedioate40445-60-1C18H21NO5
- N-(2,5-Dimethoxy-4-methylphenyl)-2,5-dimethoxybenzamide66108-98-3C18H21NO5
- rel-(3R,4aR,6aR,8S,13bR)-3,4,4a,5,6,6a-Hexahydro-3-methoxy-5-methyl-8H-[1,3]dioxolo[6,7][2]benzopyrano[3,4-c]indol-8-ol86064-46-2C18H21NO5
- 3-Ethoxy-3-[4-[(6-methoxy-2-pyridinyl)methoxy]phenyl]propanoic acid1202576-19-9C18H21NO5
- (1R,2R,4S,5S)-3-Oxa-9-azatricyclo[3.3.1.0~2,4~]nonan-7-yl (2S)-3-(acetyloxy)-2-phenylpropanoateC18H21NO5
- 2-(Boc-amino)-3-(4-hydroxynaphthalen-1-yl)propanoic Acid1259992-11-4C18H21NO5
- Benzyl N-[2-(3,4-dimethoxyphenyl)-2-hydroxyethyl]carbamate1790184-01-8C18H21NO5
- Ethyl (E)-3-((5S,8aS)-5-benzyl-3-oxodihydro-1H,3H-oxazolo[4,3-c][1,4]oxazin-8a(8H)-yl)acrylate1556097-90-5C18H21NO5
- Benzyl N-[2-(2,5-dimethoxyphenyl)-2-hydroxyethyl]carbamate153175-50-9C18H21NO5
- O-Acetyl-(-)-norscopolamineC18H21NO5
- Ethyl 1-(cyclopropylmethyl)-6,7-dimethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylate2741928-09-4C18H21NO5
- Cyclopent[1,2]indeno[5,6-d]-1,3-dioxole-8-carboxamide, 4b,5,6,7,7a,8-hexahydro-7a-hydroxy-N,N,5,5-tetramethyl-7-oxo-, (4bI+/-,7aI+/-,8I+/-)-98651-72-0C18H21NO5
- 3'-[(Benzyloxy)carbonyl]spiro[bicyclo[2.2.1]heptane-2,2'-[1,3]oxazolidine]-4'-carboxylic acid2137493-96-8C18H21NO5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-[(2-ethylcyclohexyl)oxy]acetate2248284-85-5C18H21NO5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2,2,6,6-tetramethyloxane-4-carboxylate2248330-67-6C18H21NO5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(cycloheptyloxy)propanoate2248278-17-1C18H21NO5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-[2-(propan-2-yl)oxan-4-yl]acetate2248366-34-7C18H21NO5
- tert-Butyl 8-hydroxy-7-(4-methylphenyl)-6-oxo-5-oxa-2-azaspiro[3.4]oct-7-ene-2-carboxylate2172563-71-0C18H21NO5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-(2-ethoxyethyl)cyclopentane-1-carboxylate2248400-30-6C18H21NO5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(cyclohexyloxy)butanoate2248274-80-6C18H21NO5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-[3-(tert-butoxy)cyclobutyl]acetate2248325-91-7C18H21NO5
- 4-({[(Benzyloxy)carbonyl]amino}methyl)-3-oxaspiro[bicyclo[2.1.1]hexane-2,1'-cyclobutane]-1-carboxylic acid2580233-80-1C18H21NO5
- 2-{[(tert-Butoxy)carbonyl]amino}-2-(4-methoxynaphthalen-1-yl)acetic acid1993879-12-1C18H21NO5
- Benzyl 3-[2-(furan-2-yl)-2-hydroxyethyl]morpholine-4-carboxylate2680585-23-1C18H21NO5
- Benzyl N-[2-(4-hydroxy-3,5-dimethoxyphenyl)ethyl]carbamate2680759-97-9C18H21NO5
- Benzyl N-{[4-(2-hydroxyethoxy)-3-methoxyphenyl]methyl}carbamate2680895-24-1C18H21NO5
- Benzyl N-[2-(3,5-dimethoxyphenyl)-2-hydroxyethyl]carbamate2273703-38-9C18H21NO5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3,3-dimethyl-2-[(prop-2-en-1-yloxy)methyl]butanoate2248274-43-1C18H21NO5
- Benzyl N-[2-(3-hydroxy-4,5-dimethoxyphenyl)ethyl]carbamate2763928-09-0C18H21NO5
- 9-Benzyl 3-methyl (1R,3r,5S)-7-oxo-9-azabicyclo[3.3.1]nonane-3,9-dicarboxylate2770452-37-2C18H21NO5
- Benzyl N-[2-(3,4-dihydroxyphenyl)-2-methoxyethyl]-N-methylcarbamate2770517-11-6C18H21NO5
- 3-({[(Benzyloxy)carbonyl]amino}methyl)-5-tert-butylfuran-2-carboxylic acid2913411-51-3C18H21NO5
- 7-(Aminomethyl)-3,9,10-trimethoxy-6,7-dihydrodibenzo[b,d]oxepin-7-ol1626387-44-7C18H21NO5
- (S)-2-(Boc-amino)-3-(4-hydroxynaphthalen-1-yl)propanoic Acid906356-24-9C18H21NO5
- (S)-2-(Boc-amino)-3-(8-hydroxynaphthalen-2-yl)propanoic Acid1816996-87-8C18H21NO5
- 3,4-Furandicarboxylic acid,2-[(1,1-dimethylethyl)amino]-5-phenyl-,3,4-dimethyl ester946614-70-6C18H21NO5
- rel-2-benzyl 1-ethyl (1R,3aS,6aR)-4-oxohexahydrocyclopenta[c]pyrrole-1,2(1H)-dicarboxylateC18H21NO5
- 9-Methoxy-4-methyl-11,16,18-trioxa-4-azapentacyclo[11.7.0.02,10.03,7.015,19]icosa-1(20),7,13,15(19)-tetraen-12-olC18H21NO5
- 6-(4-(tert-Butoxy)-4-oxobutoxy)quinoline-4-carboxylic acid2969680-33-7C18H21NO5
- (11S,15S)-13-Methoxy-5,7,21-trioxa-19-azahexacyclo[11.7.1.02,10.04,8.011,15.015,19]henicosa-2,4(8),9-trien-12-olC18H21NO5
- 2-(3,4-Dihydroxyphenyl)-N-[2-(3,4-dimethoxyphenyl)ethyl]acetamide1207386-32-0C18H21NO5
Frequently asked questions
What is the molar mass of C18H21NO5?
The molar mass of C18H21NO5 is 331.37 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 5 oxygen atoms. The monoisotopic mass is 331.1420 Da.
How many compounds have the formula C18H21NO5?
CompoundList lists 190 compounds with the molecular formula C18H21NO5, including N-(2,5-Dimethoxyphenyl)-2-(2-methoxyphenoxy)propanamide, 4-Methyl-3-[(2,3,4-trimethoxybenzyl)amino]benzoic acid, 2-Methyl-3-[(3,4,5-trimethoxybenzyl)amino]benzoic acid. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C18H21NO5?
C18H21NO5 has a degree of unsaturation of 9. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.